Ott told BI that Dallas/Fort Worth International Airport (DFW) is among the best US airports for layovers thanks to its premium lounges, from Amex Centurion to Delta Sky Club.

"It's one of those places where if you do have a layover and you really need to kill time, there are both top-notch lounges and an airport hotel directly in the terminal," Ott said.

DFW is also home to one of Ott's favorite US airport lounges, Capital One Lounge.

Some of the worst airports for layovers are small regional airports.

"I think there's a just inherent advantage to being a big airport because big airports can attract retail," he said.

As an example, Ott mentioned that he often has connecting flights through Blue Grass Airport in Lexington, Kentucky, which has only two runways.

"I've been there a lot. It's not a fun place to wait for flights," he said. "You have nothing to do."

Those with a tight layover may appreciate that Blue Grass Airport has the shortest walk to the gate in the US at just 0.11 miles.

"I like Seattle-Tacoma Airport because they've done a really good job of cultivating more local stores and Seattle-centric things," Ott said. "If you've got an hour and 45 minutes, it's easy to kill time there."

BI previously reported that the airport's shops pay homage to the Pacific Northwest experience, with stores like Show Pony, Made in Washington, and Discover Puget Sound.

Ott said he'd spent his layovers at the Northwestern airport sifting through records at a music store and sampling Washington state wines at a bar.

"It doesn't feel as sterile and generic as some airports. You actually get a sense of Seattle. It's not just an airport somewhere," Ott said.

No one wants to put their trip on pause over delays and cancellations — especially in a connecting airport.

According to Ott, this may be more likely to happen when flying out of Hartsfield-Jackson Atlanta International Airport in Georgia due to frequent storms. And the fact that it's the busiest airport in the world probably doesn't help; the airport has had mass cancellations in summers and winters due to storms.

"I've had hellacious experiences in Atlanta because of the weather," Ott said. "It's a good airport in the sense that there are lots of flights and places to kill time. It's a bad airport in the sense that it's caught up in more storms than most airports."

Ott added that the airport has plenty of amenities but can be overwhelming to navigate.

"There are so many terminals, and you're taking a tram everywhere. They have some nice stuff in them, but it's a hike," he said.

According to Ott, some airports don't allow passengers to travel between terminals they're not departing from.

Since many travelers don't leave the airport between connecting flights, waiting to board can be a drag for those flying out of terminals with few shops, restaurants, and amenities. Ott told BI that international terminals typically have better amenities than domestic ones.

The terminals are connected at Los Angeles International Airport (LAX), which is why it's one of the best US airports for layovers.

Domestic travelers "can still go to the international terminal, which has better food, shops, and lounges," he said. "You can kill time at LAX for hours."

LAX's Tom Bradley International Terminal (Terminal B) was updated in 2023. BI previously reported that the terminal has comfy seating — each with its own power ports — a range of food and bar options, and an exceptional Sky Club.

The upgrade included adding a walkway connecting Terminal 3, which also received an upgrade, to Terminal B. The walk takes five to 20 minutes, so there's no need to catch a bus. This is an especially useful perk for those catching an international connecting flight.

"London Heathrow Airport is an atrocious airport for connections — one of the worst in the world, by far," Ott said. Why? Getting from one terminal to another is a journey in itself.

"Some terminals are miles apart, and there is no tram that runs between all of them," he said.

According to the airport's website, getting from one terminal to another can take more than 40 minutes.

For example, Ott said if you land in Terminal 3 with British Airways, you may connect in Terminal 5.

"You have to go through Terminal 3 and take a bus, which can take up to 30 minutes to arrive. Then, you'll take a long bus ride all around the airport to the other side," he said. "And then you may still end up with another tram or bus ride because Terminal 5 has three terminals within it — A, B, and C."

"It's an impossible airport for short connections," Ott added.

"For best, Singapore Changi Airport is just untouchable," Ott said.

Ott added that the best airport for layovers worldwide has a range of shops, hotels, dining, and activities.

"Some of the best local food is at the airport because the famous places in Singapore set up locations there," he said.

While waiting for connecting flights, travelers can access a pool, a movie theater, and a butterfly garden.

The real spectacle, however, is probably the Jewel — a retail and entertainment complex connected to Terminal 1. The Jewel seems like a destination itself with a hedge maze, a topiary walk, and a ropes course. And the centerpiece is the Rain Vortex — the world's largest indoor waterfall spanning seven stories.

"You can spend an hour just looking at that," Ott said of the Rain Vortex. "I would have a layover there any day."